CN1230305A - Switch installation - Google Patents
Switch installation Download PDFInfo
- Publication number
- CN1230305A CN1230305A CN97197929A CN97197929A CN1230305A CN 1230305 A CN1230305 A CN 1230305A CN 97197929 A CN97197929 A CN 97197929A CN 97197929 A CN97197929 A CN 97197929A CN 1230305 A CN1230305 A CN 1230305A
- Authority
- CN
- China
- Prior art keywords
- bus
- interface
- switchgear
- field device
- field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/008—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result preventing unsafe switching operations in substations (Schaltfehlerschutz)
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00012—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using an auxiliary transmission line
- H02J13/00014—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using an auxiliary transmission line carrying signals having the network frequency or DC signals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Power Sources (AREA)
- Patch Boards (AREA)
Abstract
A switching installation (1a, 1b, 1c) for high or medium voltage applications is disclosed. The object of the invention is to provide an easy and practical solution to transmit information with a high reliability. For that purpose, field generators (9) which are connected by a first bus line (7) to a central controlling unit (3) feed each a second bus line (15) to which the controllers of the switching devices (19a to 21n) of the corresponding switching field generators are connected. The second bus line (15) is formed by an auxiliary line of the switching installation (1a, 1b, 1c).
Description
The present invention relates to a kind of high pressure or medium voltage switchgear equipment, it has a central control unit.
By concrete control circuit control, this control circuit for example can belong to so-called " the circuit technology of switchgear " usually for high pressure or medium voltage switchgear equipment.Paper on the 22nd to 31 page in the specialty report of the electrical technology company (ETG) of theming as " microelectronics in the power technology " of the 14th phase (Nr.14) has been described different line constructions in " using the new line technology of microcomputer in switchgear " for example.
Each branch road of one switchgear is furnished with a splitter, and this splitter provides the energy by a personal voltage power supply device of equipment, and by and tie be connected with switchgear.
A kind ofly as can be known from EP 035553281 be used for the equipment of Data transmission and supply power voltage by a bus, wherein this equipment is used in production Technology and the production process.At this, can be with the field device (Feldgeraete) that spatially separates each other with inherently safe and explosion-proof mode, and be connected in central authorities at a distance with very little cost.Preferably a voltage feed circuit in each equipment is used as bus line.
Yet this supply line usually breaks down and voltage fluctuation, therefore, in being provided with the equipment of safety protection technique, also differ guarantee surely each the device between reliable transfer of data.This is especially unfavorable when being used for for distribution switchgear, because at this moment also exist the trouble of electromagnetic interference aspect.
Suggestion is carried out a kind of redundant information transmission by an auxiliary voltage source in the former a German patent application 19520596.0 in switchgear.
The objective of the invention is in a kind of high pressure or medium voltage switchgear equipment, provide a kind of simple and practical being used to have very high failure safe protectiveness ground and carry out the technical solution that information is transmitted.
The objective of the invention is to finish by a kind of like this high pressure or medium voltage switchgear equipment, this switchgear has a central control unit, this central control unit links to each other with the field device of predetermined quantity by one first bus, these field devices have one first and second interface respectively, article one, be connected in second interface with second a relevant bus, the control device of ground connection and/or disconnect can be connected on second bus, wherein bus is made of a personal circuit, and the field device of predetermined quantity is connected with at least one power switch.
The circuit of this switchgear has a kind of structure that is suitable for the requirement of switchgear most, and has kept the low wiring cost of the control circuit on the line level.Can save about 20 strands of heart yearns for a general switching device.
Advantageously, power switch is connected in each field device that is distributed by one the 3rd interface.So just can directly carry out rapidly and reliably and closely-related operating process of time, for example execute protection-disconnection-order, and can not cause serious harm to the operational reliability of equipment.
At this, the 3rd interface can constitute bus interface, and this interface can connect other subscriber equipment.So this interface is multi-functional.Other subscriber equipment can be the portable terminal, particularly a portable computer that is used for data inputs and inquiry, can also be protective device, the input unit of signal and measured value, or required device on other line level.
The data transmission rate of the 3rd interface cans be compared to the first interface height most, to adapt to the information flow demand that improves on interface.
The control device of each power switch can constitute an assembly with each field device that distributes.So just can in switchgear, realize a kind of structure of saving the space.Therefore, " intelligence " about the field for example can be integrated in the control cubicle of power switch.
Advantageously, switch misoperation protective device of each field device configuration has so just guaranteed reliable switch on the level on the scene.At this, can utilize and a barring condition relevant with equipment.Advantageously, each switch misoperation protective device all constitutes an assembly with its field device that is distributed, thereby has improved the structure in this saving space.If switch misoperation protective device is made of a Digital Data Processing Equipment that has computer, then it also can be the member of the field device on the program unit meaning.
Describe embodiments of the invention, other advantage and details by way of example in detail below in conjunction with accompanying drawing, in the accompanying drawing:
Figure 1 shows that the schematic diagram of the line construction of a switchgear,
Figure 2 shows that another kind of selectable switchgear,
Figure 3 shows that according to Fig. 1 and have one and overlap the switchgear that data connect.
Fig. 1 illustrates the schematic diagram of the track data connection of first kind of switchgear 1a.On the platform line level S of this switchgear, be provided with a central control unit 3, its central authorities' guidance as whole switchgear or platform-and order general bureau.According to prior art, this comprises service-and visual device, particularly picture screen, keyboard, printer or the like certainly, but is not shown specifically in the drawings.
In order to be connected to the higher level network control center, a so-called Remote Control Interface 5 can be set.In this respect, the circuit commonly used in the switchgear of prior art also can be referring to starting the paper of being mentioned.Represent field line level hereinafter and install level with F and U among the figure, and with chain-dotted line with this two-stage separately.
In order to connect first bus 7, central control unit 3 has a corresponding outlet or a corresponding interface.Because first bus 7 should be used for whole, so also it can be referred to as the platform bus.
Field device 9 have first interface 11 and that is used to connect first bus 7 be used to be connected one with second interface 13 of the second relevant bus 15.By all switching devices of these 15, one fields of second bus, for example the disconnect 21a to 21n of the earthed switch 19a to 19n of a power switch 17, predetermined quantity and predetermined quantity is connected with each other.
On this meaning, second bus also is referred to as so-called " personal bus ".Therefore, this personal electric supply installation is simultaneously also as bus.This is preferably relevant with the field.Wiring in parallel with regard to need not to be provided for transmitting corresponding information like this for the order between central control unit 3 and each switching device 17 or notice transmission.Existing circuit, that is, personal supply line just can be used as second bus 15.
The field device 9 relevant with the field can comprise a plurality of functions, device or parts.It also can constitute a housing unit, and the different parts of realizing following function can be set in this housing unit.These known parts illustrate separately in the drawings, do not use line.
Another device or function are the switch fault protective devices, are called switch fault protector 27 below, and it discharges and locking accordingly according to the relevant regulations of relevant switching operation.Therefore, must handle the barring condition of each switching device 17 to 21n.This can be relevant with the field, considers top viewpoint about central control unit 3, also can be relevant with equipment.
Field device 9 also comprises a common field wire road device 29, and it is used in particular for the exchanges data with central control unit 3, and bears the common functional task of each.At this, also can stipulate supplemental characteristic or the general function relevant with the field, for example be used for depositing of a kind of information processing or parametrization data.
In addition, also connect another device 30 by the 3rd interface 31 of arranging arbitrarily on field device 9, for example parametrization device or one start terminal.
Shown second bus 15 is a bus system in principle, and for example, it provides the information transmission of a redundancy.Therefore, each has a plurality of personal electric supply installations, for example the equipment particularly suitable of an alternating voltage and DC-voltage supply device.By the solution of this redundancy, can form reliable data passes inside basically.
Article one, so personal bus is to a central bus system (according to first bus system 7) or the cheapness of a process bus relevant with the field and replenishing of less investment, the necessary connection thereon of all devices in.By current solution, not only processing unit disperses, and whole bus apparatus also disperses.
Fig. 2 illustrates another kind of selectable switchgear 1b, and it not only relates to whole, and relates to a line level F, and field device 9 has one the 3rd interface 31, is used for one article of the 3rd bus 33.Compare with second bus 15, the data transmission rate of the 3rd bus 33 is much higher, therefore, be specially adapted to the link information demand big or need with the device of closely-related processing of time.The particularly power switch 17 of subsidiary control device that belongs to this type of, other also has for example a terminal 34 or other and relevant device, for example a protective device, an active measuring transformer and an input/output unit.For example, the device that marks with Reference numeral 35 among the figure a kind of device that comes to this.
Certainly, can also connect for the data that this 3rd bus 33 relevant with the field is provided with a redundancy by another bus 36 (dotted line is represented).By this method, even if under the situation of carrying out the information transmission relevant with high data rate, also guaranteed reliable operation with safe practice.Meaningfully, second bus 15 also can be implemented redundantly.Fig. 2 illustrates a hybrid system, in this system, realizes a kind of self power supply by direct current and AC power 23 and 23a.
Certainly, for embodiment shown in Figure 2, device or functional block, particularly bus coupler 25, switch misoperation protector 27 and field wire road device 29 can combination in any, in groups or separately.Therefore, the control device that also can consider the power switch 17 that will not be shown specifically among each funtion part and the figure constitutes an assembly.At this, can in power switch 17, provide a switch misoperation protector.The combination of this part and/or function is variable.
Fig. 3 illustrates the equipment of field switch more than a 1C, and wherein field device 9a, 9b, 9c for example distribute to an another arena, a coupled field and another another arena.The internal structure of field device 9a, 9b, 9c is with recited above identical.
Structure on principle the embodiment with shown in Figure 1 relevant with the field is identical, and each power switch 17a, 17b shown in broken lines, 17c can select directly to be coupling on field device 9a, 9b, the 9c among the figure.
In addition, a bus 36 is shown also in this total figure, this bus can be used as personal bus or also can be used as replenishes bus formation on traditional bus equipment.Importantly, bus 36 plays the effect of overlap joint field, and field device 9a to 9c is connected to each other in this case.This may be for example special meaningful in addition for switch misoperation defencive function.When the field overlap joint locking that has central information in the coupled field must be set, do effective especially like this.Realized thus a kind of from each minute road direction have the inquiry of the field device (at this for field device 9b) of central functionality.
For present idea importantly, set up hierarchy with regard to the line unit of switchgear, this hierarchy also comprises bus structures.Nethermost bus level is made of a personal bus with lower cost in, needn't add in the field and lay circuit.
Can estimate that from the innovation speed of electronics technology aspect for this personal bus system, data transmission bauds will have a very big raising.In principle, can carry out the total data exchange of an equipment by a personal bus system in the future.This is equally applicable to data, the parameter of other device,, should be specifically noted that and closely-related function of time when development for this reason.
Claims (7)
1. a high pressure or medium voltage switchgear equipment (1a, 1b, 1c) with central control unit (3), the field device (9) with corresponding first interface (11) of predetermined quantity is connected with this central control unit (3) by one first bus (7),
Wherein each field device (9) has one second interface (13) and is used for and relevant second bus (15), and the control device of ground connection and/or disconnect (19a to 21n) is connected in described second bus,
Wherein second bus (15) is made of a personal circuit,
Wherein go up and connect at least one power switch (17) at the field device (9) of each predetermined quantity.
2. switchgear as claimed in claim 1, wherein said power switch (17) is connected with corresponding field device (31) by the second or the 3rd interface (13 or 31).
3. switchgear as claimed in claim 2, wherein said the 3rd interface (13) is designed to bus interface, other user's set, particularly operation and/or protective device are connected in this interface.
4. as claim 2 or 3 described switchgears, the data transmission rate of wherein said the 3rd interface (31) is than described second interface (13) height.
5. as each described switchgear in the claim 1 to 4, wherein the control device of each power switch (17) constitutes an assembly with corresponding each field device (9).
6. as each described switchgear in the claim 1 to 5, it is characterized in that: each field device (9) comprises a switch misoperation protector (27).
7. switchgear as claimed in claim 6, wherein each switch misoperation protector (27) constitutes an assembly with corresponding field device (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19630614A DE19630614A1 (en) | 1996-07-29 | 1996-07-29 | Switchgear |
| DE19630614.0 | 1996-07-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1230305A true CN1230305A (en) | 1999-09-29 |
| CN1097872C CN1097872C (en) | 2003-01-01 |
Family
ID=7801205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97197929A Expired - Fee Related CN1097872C (en) | 1996-07-29 | 1997-07-17 | Switch installation |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6137776A (en) |
| CN (1) | CN1097872C (en) |
| DE (1) | DE19630614A1 (en) |
| ID (1) | ID19733A (en) |
| TW (1) | TW358254B (en) |
| WO (1) | WO1998005111A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102549866A (en) * | 2009-09-30 | 2012-07-04 | Abb股份公司 | Communication network for a low voltage electric switchgear |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19817944A1 (en) * | 1998-04-17 | 1999-10-21 | Siemens Ag | Switch mechanism for an electric switching system esp. a high voltage system |
| DE29807269U1 (en) * | 1998-04-17 | 1998-06-18 | Siemens AG, 80333 München | Switchgear with a device for transmitting data |
| DE19960870A1 (en) * | 1999-12-17 | 2001-06-28 | Greiner Schaltanlagen Gmbh | Electrical or electronic switch device for connecting switch appliance with adjustable parameters, includes memory store holding main settings for switch appliance assigned to it while supplying resistance |
| DE10013665C2 (en) * | 2000-03-20 | 2003-11-06 | Fresenius Medical Care De Gmbh | Medical device with double communication bus |
| DE10029664A1 (en) * | 2000-06-23 | 2002-01-03 | Uwe Zeiler | Air conditioning system for central communications and computer machine rooms has re-cooling mechanisms and refrigeration machines reconfigurable in failure situation |
| US20030048007A1 (en) * | 2001-09-07 | 2003-03-13 | Claude Mercier | Electronic power management system |
| DE10244845A1 (en) * | 2002-09-20 | 2004-04-08 | Siemens Ag | Arrangement for controlling and monitoring a switchgear |
| DE10302485B4 (en) * | 2003-01-23 | 2008-10-16 | Abb Ag | Fieldbus connection in switchgear |
| DE102005007017B4 (en) * | 2005-02-15 | 2015-04-16 | Abb Technology Ag | Medium or high voltage switchgear consisting of at least one switching device |
| DE102005061845B4 (en) * | 2005-12-23 | 2013-07-18 | Siemens Aktiengesellschaft | Device for powering field devices |
| US7423412B2 (en) * | 2006-01-31 | 2008-09-09 | General Electric Company | Method, apparatus and computer program product for injecting current |
| US9180238B2 (en) * | 2008-06-11 | 2015-11-10 | Baxter International Inc. | Distributed processing system and method for dialysis machines |
| US20090315668A1 (en) * | 2008-06-19 | 2009-12-24 | Light Corporation | Wiring topology for a building with a wireless network |
| DE102010060938A1 (en) | 2010-12-01 | 2012-06-06 | Technische Universität Dortmund | control system |
| US9031702B2 (en) | 2013-03-15 | 2015-05-12 | Hayward Industries, Inc. | Modular pool/spa control system |
| DE102014103230B3 (en) * | 2014-03-11 | 2015-06-11 | Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co | switchgear |
| EP3086428B1 (en) | 2015-04-23 | 2020-02-26 | Siemens Aktiengesellschaft | Method and assembly for parameterizing field control devices and/or protection devices of a circuit assembly |
| CN116206744A (en) | 2015-06-25 | 2023-06-02 | 甘布罗伦迪亚股份公司 | Medical device systems and methods with distributed databases |
| CN105262215A (en) * | 2015-10-28 | 2016-01-20 | 成都振中电气有限公司 | Power system switch station background monitoring device |
| US20170212536A1 (en) | 2016-01-22 | 2017-07-27 | Hayward Industries, Inc. | Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment |
| US11720085B2 (en) | 2016-01-22 | 2023-08-08 | Hayward Industries, Inc. | Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4536126A (en) * | 1970-12-18 | 1985-08-20 | Westinghouse Electric Corp. | System and method employing a digital computer for automatically synchronizing a gas turbine or other electric power plant generator with a power system |
| GB1536046A (en) * | 1976-06-30 | 1978-12-20 | Ibm | Data processing system power control |
| US4234926A (en) * | 1978-12-05 | 1980-11-18 | Sealand Service Inc. | System & method for monitoring & diagnosing faults in environmentally controlled containers, such system and method being especially adapted for remote computer controlled monitoring of numerous transportable containers over existing on-site power wiring |
| US4497031A (en) * | 1982-07-26 | 1985-01-29 | Johnson Service Company | Direct digital control apparatus for automated monitoring and control of building systems |
| DE3517566A1 (en) * | 1984-05-26 | 1985-11-28 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | METHOD AND DEVICE FOR SWITCHING ERROR-PROTECTED OPERATION OF A SWITCHGEAR CONSISTING OF MULTIPLE SWITCHING PANELS IN AN ELECTRICAL POWER DISTRIBUTION NETWORK |
| DE3617566A1 (en) * | 1986-05-24 | 1987-11-26 | Kreft Fritz Hermann | Anchoring device |
| DE3828272A1 (en) * | 1988-08-19 | 1990-03-01 | Siemens Ag | ARRANGEMENT FOR TRANSMITTING DATA AND A SUPPLY VOLTAGE THROUGH A BUS LINE |
| DE3907652A1 (en) * | 1989-03-09 | 1990-09-13 | Siemens Ag | CIRCUIT ARRANGEMENT FOR TRANSMITTING BINARY SIGNALS AND ENERGY OVER A LINE |
| JP2868162B2 (en) * | 1991-03-29 | 1999-03-10 | 株式会社日立製作所 | Redundant fieldbus system |
| DE4403961C2 (en) * | 1994-02-04 | 1997-07-03 | Hartmann & Braun Ag | Feeding system for an intrinsically safe fieldbus |
| DE19501489A1 (en) * | 1995-01-19 | 1996-07-25 | Abb Patent Gmbh | Telegram information transmission using European Installation Bus system e.g. for control of lighting units |
| DE19520596A1 (en) * | 1995-06-06 | 1996-12-12 | Siemens Ag | Combined data and energy transmission system |
| US6657741B1 (en) * | 1995-08-07 | 2003-12-02 | Tr Systems, Inc. | Multiple print engine system with selectively distributed ripped pages |
-
1996
- 1996-07-29 DE DE19630614A patent/DE19630614A1/en not_active Withdrawn
-
1997
- 1997-07-08 TW TW086109580A patent/TW358254B/en active
- 1997-07-17 CN CN97197929A patent/CN1097872C/en not_active Expired - Fee Related
- 1997-07-17 WO PCT/DE1997/001513 patent/WO1998005111A1/en active Application Filing
- 1997-07-28 ID IDP972615A patent/ID19733A/en unknown
-
1999
- 1999-01-29 US US09/240,716 patent/US6137776A/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102549866A (en) * | 2009-09-30 | 2012-07-04 | Abb股份公司 | Communication network for a low voltage electric switchgear |
| CN102549866B (en) * | 2009-09-30 | 2015-04-08 | Abb股份公司 | Communication network for a low voltage electric switchgear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1097872C (en) | 2003-01-01 |
| TW358254B (en) | 1999-05-11 |
| US6137776A (en) | 2000-10-24 |
| ID19733A (en) | 1998-07-30 |
| DE19630614A1 (en) | 1998-02-05 |
| WO1998005111A1 (en) | 1998-02-05 |
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